feat: add Mantle chain support

[wmzy]

Is there an existing issue for this?

• I have searched the existing issues

Current Behavior

We are trying to use JSON Provider with Mantle, and the chain is not yet supported.

{
    "status": "FAILED",
    "reasons": [
        {
            "field": "chainId",
            "description": "We don't support the chainId you provided: eip155:5000. See the list of supported chains here: https://docs.walletconnect.com/cloud/blockchain-api#supported-chains"
        }
    ]
}

Requested Behavior

Please add support for Mantle:

Mantle Mainnet:

ChainID: 5000
HTTP Endpoint: https://rpc.mantle.xyz

Mantle Testnet(Goerli)
ChainID: 5001
HTTP Endpoint: https://rpc.testnet.mantle.xyz

Testnet (Sepolia):

ChainID: 5003
HTTP Endpoint: https://rpc.sepolia.mantle.xyz

Anything else?

No response

[geekbrother]

Hello, @wmzy !
We don't have a Mantle chain support yet. Please check the supported chains doc.

[geekbrother]

We are currently considering options and demand for adding this network.